Which window type projects outward in a curved arc to form a rounded bay?

• A. Bay window
• B. Bow window
• C. Dormer
• D. Oriel

Answer: (B)

Bow windows project outward in a curved arc, creating a rounded bay. They’re made from multiple window units arranged along a gentle curve, so the exterior looks circular and the interior forms a smooth, rounded nook. A bay window, while it also projects, is typically a wedge-shaped setup with windows arranged at angles, not a continuous curve. A dormer adds a window to a sloped roof, not a curved exterior projection. An oriel window projects from an upper wall but isn’t defined by a curved arc forming a rounded bay. So the curved, outward projection that creates a rounded bay is the characteristic feature of a bow window.